(Note: I could've used Mad Props as the title but that's already been done like a thousand times)
I stumbled upon a really sweet TF2 mod a few days ago. The red team spawns as various pieces of scenery (barrels, rocks, trees, etc.) with the scout's health, and the blue team spawns as pyros. Blue has to kill all the scenery scouts before time is up or else red wins. Needless to say, the sight of a tree running away from a pyro is pure awesomeness. If you've not played it, you don't get to sit with the cool kids at lunch. You also don't get to sniff dry erase markers with us during recess.
Mad Props (couldn't resist) to the mod author. The Steam group page has a list of servers to play on.